...keep out the dirt) should reach up very near to the roof ; the bottom end of this pipe or tube I would continue to the bank of the pit ; and as in the case...water you proceed to remove the accumulation by a water-pump, so in this case I would pump out the accumulation of light carburetted hydrogen by means...

...keep out the dirt) should reach up very near to the roof ; the bottom end of this pipe or tube I would continue to the bank of the pit ; and as in the case...water you proceed to remove the accumulation by a water-pump, so in this case I would pump out the accumulation of light carburetted hydrogen by means...

...out the dirt), should reach up very near to "the roof; the bottom end of this pipe or tube I would " continue to the bank of the pit ; and as, in the case...used in foundries would do " as well or even better.) " " I ask your common sense could you not as certainly in " this way draw off every cubic foot of gas...

...out the dirt), should reach up very near to "the roof; the bottom end of this pipe or tube I would " continue to the bank of the pit ; and as, in the case...light carburetted hydrogen by means of an air pump 135 " (probably a small fan like that used in foundries would do " as well or even better.) " " I ask...

...keep out the dirt) should reach up very near to the roof ; the bottom end of this pipe or tube I would continue to the bank of the pit ; and as, in the case...water, you proceed to remove the accumulation by a water-pump, so in this case, I would pump out the accumulation of light carburetted hydrogen by means...